Circuit breaker mechanism comprising three groups of micro-energy opening trip coils

Abstract

The utility model discloses a circuit breaker mechanism comprising three groups of micro-energy opening tripping coils, which comprises a three-phase tripping coil, an opening tripping plate and an energy storage transmission mechanism, and the energy storage transmission mechanism is linked with an energy storage shaft of the circuit breaker mechanism and the three-phase tripping coil to enable the three-phase tripping coil to store energy. According to the utility model, the energy storage transmission mechanism is linked with the energy storage shaft and the three-phase trip coil to enable the three-phase trip coil to store energy, and the three-phase trip coil is linked with the opening trip plate to enable the circuit breaker mechanism to be opened and tripped, so that the three-phase trip coil releases energy and is linked with the opening trip plate to enable the circuit breaker mechanism to be opened and tripped. Therefore, the protection tripping of the circuit breaker can be realized only by providing the input of which the energy is less than or equal to 0.1 J.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ring main unit, and relates to a circuit breaker mechanism containing three groups of micro-energy tripping coils. BACKGROUND

[0002] The protection tripping coil of the high-voltage circuit breaker often needs relatively stable power input, but the high-voltage circuit breaker in some areas needs to be protected and tripped under the condition of micro-energy tripping technology and energy less than or equal to 0.1J, but the current high-voltage circuit breaker cannot meet the micro-energy tripping requirement; in addition, the tripping coil needs to be additionally provided with three-phase configuration, and the current mechanism space is insufficient to accommodate. SUMMARY

[0003] The utility model discloses in order to overcome at least one prior art's insufficient, provide a kind of circuit breaker mechanism containing three groups of micro-energy tripping coils.

[0004] In order to realize the above-mentioned purpose, the utility model discloses the following technical scheme: a kind of circuit breaker mechanism containing three groups of micro-energy tripping coils, including three-phase tripping coil, tripping plate and energy storage transmission mechanism, energy storage transmission mechanism is linked with the energy storage shaft of circuit breaker mechanism and three-phase tripping coil, so that three-phase tripping coil stores energy, and three-phase tripping coil is linked with tripping plate and releases energy, so that circuit breaker mechanism is tripped.

[0005] Further, the three-phase tripping coil is three independent tripping coils, the tripping coil includes a permanent magnet, an iron core, and a compression spring, and the compression spring is sleeved outside the iron core.

[0006] Further, the energy storage transmission mechanism includes an energy storage cam and an energy storage crank, the energy storage cam is fixedly arranged on the energy storage shaft, the energy storage crank is rotatably connected to the operating mechanism of the circuit breaker mechanism, and the energy storage cam is linked with the energy storage crank.

[0007] Further, the energy storage crank is linked with the iron core to retract the iron core, the tripping plate is abutted with the iron core, and the tripping coil stores energy; when the circuit breaker mechanism is in the closed state, the tripping coil is energized and releases energy, and the tripping plate is moved by the linkage of the iron core and the tripping plate, so that the circuit breaker mechanism is in the open state.

[0008] Further, the operating mechanism is fixedly provided with a bearing sleeve, and the energy storage crank is rotatably connected to the bearing sleeve.

[0009] Further, the energy storage crank includes a fixed end and a free end, the fixed end is rotatably connected to the operating mechanism, and the free end faces the iron core.

[0010] Further, the energy storage crank is provided with a bending portion, the bending portion is located between the fixed end and the free end, the convex portion of the bending portion faces the energy storage cam, and the protruding end of the energy storage cam faces the convex portion.

[0011] Further, a pin is fixed on the bending part, and the protruding end of the energy storage cam abuts against the pin.

[0012] Further, the energy storage transmission mechanism further comprises a crank arm reset spring connected with the energy storage crank arm and the operating mechanism, and the energy storage crank arm is reset by the energy storage transmission mechanism.

[0013] Further, the energy storage shaft is connected with the operating mechanism, the three-phase tripping coil, the opening tripping plate and the energy storage transmission mechanism are installed in the operating mechanism, and the opening tripping plate is linked with the tripping device and the opening device of the circuit breaker mechanism.

[0014] In summary, the utility model has the advantages that:

[0015] 1) The three-phase tripping coil of the utility model is three independent tripping coils, which meets independent three-phase protection and is safer, and the three-phase tripping coil is simple in structure and small in overall size, compared with the three-phase configuration which needs to be additionally increased due to insufficient space of the existing circuit breaker mechanism, the three-phase tripping coil of the utility model can be installed in the existing operating mechanism.

[0016] 2) The energy storage transmission mechanism, the energy storage shaft and the three-phase tripping coil are linked to store energy in the three-phase tripping coil, and the three-phase tripping coil is linked with the opening tripping plate to release energy and make the circuit breaker mechanism open and trip, so that the circuit breaker protection tripping can be realized by providing an input of less than or equal to 0.1J. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic view of the circuit breaker mechanism tripping coil without energy storage of the utility model.

[0018] Figure 2 It is a schematic view of the circuit breaker mechanism tripping coil with energy storage of the utility model.

[0019] Figure 3 It is a schematic view of the tripping coil of the utility model.

[0020] Figure 4 It is a schematic view of the energy storage crank arm of the utility model. DETAILED DESCRIPTION

[0021] The embodiments of the utility model are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the utility model from the content disclosed in the specification. The utility model can also be implemented or applied through different specific embodiments, and various modifications or changes can be made based on different viewpoints and applications without departing from the spirit of the utility model. It should be noted that the following examples and features in the examples can be combined with each other without conflict.

[0022] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. Therefore, the drawings only show the components related to the present invention and are not drawn according to the number, shape and size of the components in actual implementation. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0023] In this embodiment of the invention, all directional indicators (such as up, down, left, right, front, back, horizontal, vertical, etc.) are only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indicator will also change accordingly.

[0024] Due to installation errors and other reasons, the parallel relationship referred to in the embodiments of this utility model may actually be an approximate parallel relationship, and the perpendicular relationship may actually be an approximate perpendicular relationship.

[0025] Example 1:

[0026] like Figures 1-4 As shown, a circuit breaker mechanism comprising three sets of micro-energy trip coils includes a three-phase trip coil 1, a trip plate 4, and an energy storage transmission mechanism. The energy storage transmission mechanism, in conjunction with the energy storage shaft 7 of the circuit breaker mechanism and the three-phase trip coil 1, enables the three-phase trip coil 1 to store energy. The three-phase trip coil 1 releases energy and, in conjunction with the trip plate 4, enables the circuit breaker mechanism to trip.

[0027] The energy storage shaft 7 is connected to the pre-installed operating mechanism 8 inside the circuit breaker mechanism. The three-phase trip coil 1, the tripping plate 4, and the energy storage transmission mechanism are installed in the operating mechanism 8. The energy storage shaft 7 is driven by the operating mechanism and rotates clockwise during energy storage. The structure of the operating mechanism 8 adopts the structure of a conventional circuit breaker mechanism. The selection is based on the circuit breaker model and has not been improved in this application. Therefore, it is not limited or described in detail here. The tripping plate 4 is linked to the tripping device pre-installed inside the circuit breaker mechanism. The three-phase trip coil 1 releases energy to drive the tripping. The trip plate 4 moves, and the movement of the trip plate 4 drives the tripping device, enabling the circuit breaker to complete the tripping. The structure of the tripping device adopts the structure of a conventional circuit breaker mechanism, and the selection is based on the circuit breaker model. This application has not made any improvements, and will not limit or elaborate on it here. The trip plate 4 is driven by the tripping device pre-set inside the operating mechanism 8. When storing energy, the trip plate 4 resets. The structure of the tripping device adopts the structure of a conventional circuit breaker mechanism, and the selection is based on the circuit breaker model. This application has not made any improvements, and will not limit or elaborate on it here.

[0028] The three-phase tripping coil 1 is three independent tripping coils, which meets independent three-phase protection and is safer. The three-phase tripping coil 1 has a simple structure and a small overall size. Compared with the existing circuit breaker mechanism, the three-phase tripping coil 1 of the embodiment can be installed in the existing operating mechanism 8 and can be built-in or external to the operating mechanism 8 for easy maintenance. The specific installation position can be set according to actual needs, for example, as shown in FIG. 8, the three-phase tripping coil 1 is installed on the outside of the operating mechanism 8. Figures 1-2

[0029] The tripping coil includes a permanent magnet 11, an iron core 12, and a compression spring 13. When the iron core 12 is forced to move towards the permanent magnet 11 (hereinafter referred to as retraction), the compression spring 13 is compressed. When the iron core 12 is retracted, the compression spring 13 is compressed and stores energy until it is stopped at the energy storage position under the attraction of the permanent magnet 11.

[0030] When the tripping coil loses power, the energy storage transmission mechanism is linked with the iron core 12, so that the iron core 12 retracts, and the compression spring 13 is compressed to store energy until it is stopped at the energy storage position under the attraction of the permanent magnet 11.

[0031] When the tripping coil of any phase is powered on, i.e., the protection signal is started, and a small amount of energy is input, the tripping coil generates a magnetic field opposite to the permanent magnet. The energy storage state of the iron core 12 is broken, the compression spring 13 releases energy to make the iron core 12 expand, the iron core 12 hits the opening tripping plate 4 to drive it to move, the opening tripping plate 4 drives the tripping device in the circuit breaker mechanism, so that the circuit breaker completes the opening tripping.

[0032] The energy storage transmission mechanism includes an energy storage cam 2 and an energy storage crank arm 3. The energy storage cam 2 is fixedly arranged on the energy storage shaft 7 and rotates synchronously with the energy storage shaft 7. The energy storage crank arm 3 is rotationally connected to the operating mechanism 8. The energy storage cam 2 is linked with the energy storage crank arm 3. The energy storage crank arm 3 is linked with the iron core 12 to make the iron core 12 retract. The opening tripping plate 4 abuts against the iron core 12, and the tripping coil stores energy, so that the circuit breaker mechanism is in an energy storage state. When the circuit breaker is in a closing state, the tripping coil releases energy in a powered state, and the iron core 12 is linked with the opening tripping plate 4 to make the opening tripping plate 4 move, so that the circuit breaker mechanism is in an opening state.

[0033] The energy storage crank arm 3 includes a fixed end 31 and a free end 32. The fixed end 31 is rotationally connected to the operating mechanism 8. The free end 32 covers the length of the iron core 11 of the three-phase tripping coil 1. The free end 32 can abut against the end surface of the iron core 11 and push the iron core 11 to retract.

[0034] ​The energy storage crank 3 is provided with a bending part 33 between the fixed end 31 and the free end 32, the convex part of the bending part 33 faces the energy storage cam 2, the convex end of the energy storage cam 2 is opposite to the convex part, so as to reduce the distance between the action point of the energy storage cam 2 and the energy storage crank 3, and the overall space can be reduced, the bending part 33 is fixedly provided with a pin 331, the convex end of the energy storage cam 2 abuts against the pin 331, so as to drive the energy storage crank 3 to rotate.

[0035] The energy storage transmission mechanism further comprises a crank reset spring (not shown in the figure), the crank reset spring is connected with the energy storage crank 3 and the operating mechanism, the energy storage crank 3 rotates to store energy in the crank reset spring, and the energy storage crank 3 is reset by releasing the energy in the crank reset spring.

[0036] The rotating connection between the energy storage crank 3 and the operating mechanism 8 is specifically as follows:

[0037] The operating mechanism 8 is fixedly provided with a bearing sleeve 6, and the fixed end 31 of the energy storage crank 3 is rotatably connected to the bearing sleeve 6.

[0038] The linkage between the energy storage cam 2 and the energy storage crank 3 is specifically as follows:

[0039] The energy storage process of the circuit breaker mechanism from opening to closing includes two stages, in the first stage, according to the visual angle of Figure 1 the energy storage cam 2 rotates clockwise along with the energy storage shaft 7, in this process, the convex end of the energy storage cam 2 abuts against the energy storage crank 3 and drives the energy storage crank 3 to rotate counterclockwise, the crank reset spring stores energy, and the energy storage crank 3 contacts the iron core 12 of the three-phase tripping coil 1 in the rotating process, and pushes the iron core 12 to retract until it stays in an energy storage holding position. In the second stage, the energy storage shaft 7 continues to rotate clockwise, the energy storage cam 2 continues to rotate, the convex end of the energy storage cam 2 is disengaged from the energy storage crank 3, the energy storage crank 3 is reset by releasing the energy in the crank reset spring, and interference between the three-phase tripping coil 1 and the energy storage crank 3 is avoided when the three-phase tripping coil 1 releases energy.

[0040] The opening tripping plate 4 is linked with the tripping device, and when the opening tripping plate 4 is hit and moved by the iron core 12, the tripping device is moved to make the circuit breaker mechanism in an open state. When the circuit breaker mechanism stores energy, the opening tripping plate 4 is driven by the force opening device, and the moving direction is consistent with the retracting direction of the iron core 12, and when the iron core 12 stays in the energy storage holding position, the opening tripping plate 4 is reset and the end surface of the iron core 12 abuts against.

[0041] In the embodiment, the three-phase tripping coil 1 stores energy through the linkage of the energy storage transmission mechanism, the energy storage shaft 7 and the three-phase tripping coil 1, and the circuit breaker mechanism is opened and tripped through the linkage between the three-phase tripping coil 1 releasing energy and the opening tripping plate 4, so that the input energy is less than or equal to 0.1J, and the circuit breaker protection tripping can be realized.

[0042] The implementation process of the embodiment is: when the circuit breaker mechanism stores energy, the energy storage shaft 7 is driven to rotate clockwise by the operating mechanism, driving the energy storage cam 2 to rotate clockwise synchronously, the energy storage cam 2 drives the energy storage crank arm 3 to rotate counterclockwise, the energy storage crank arm 3 pushes the iron core 11 to retract, the compression spring 13 is compressed to store energy, and the tripping release plate 4 is reset, the iron core 11 stays at the energy storage holding position, the tripping release plate 4 abuts against the iron core 11, the energy storage cam 2 continues to rotate and is disengaged from the energy storage crank arm 3, the energy storage crank arm 3 is reset, and until the circuit breaker mechanism completes energy storage, when the circuit breaker mechanism is in the closing state, the release coil receives the microcomputer signal of the circuit breaker mechanism, the energy storage holding compression spring 13 releases energy, the iron core 13 extends and hits the tripping release plate 4, and the circuit breaker mechanism is tripped.

[0043] Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor should belong to the scope of protection of the present application.

Claims

1. A circuit breaker mechanism comprising three sets of micro-energy trip coils, characterized in that: The three-phase tripping coil, the opening tripping plate and the energy storage transmission mechanism are included, the energy storage transmission mechanism is linked with the energy storage shaft of the circuit breaker mechanism and the three-phase tripping coil to store energy for the three-phase tripping coil, and the energy release of the three-phase tripping coil is linked with the opening tripping plate to open the circuit breaker mechanism.

2. A circuit breaker mechanism comprising three sets of micro-energy trip coils as claimed in claim 1, wherein: The three-phase tripping coil is three independent tripping coils, and the tripping coil includes a permanent magnet, an iron core and a compression spring.

3. A circuit breaker mechanism comprising three sets of micro-energy trip coils as claimed in claim 2, wherein: The energy storage transmission mechanism includes an energy storage cam and an energy storage crank, the energy storage cam is fixed on the energy storage shaft, and the energy storage crank is rotationally connected to the operating mechanism of the circuit breaker mechanism.

4. A circuit breaker mechanism comprising three sets of micro-energy trip coils as claimed in claim 3 wherein: The energy storage crank is linked with the iron core to retract the iron core, the opening tripping plate is abutted with the iron core, and the tripping coil stores energy; when the circuit breaker mechanism is in the closing state and the tripping coil is in the energized state, the energy is released, the opening tripping plate is moved through the linkage of the iron core and the opening tripping plate, so that the circuit breaker mechanism is in the opening state.

5. A circuit breaker mechanism comprising three sets of micro-energy trip coils as claimed in claim 3 wherein: The operating mechanism is fixed with a bearing sleeve, and the energy storage crank is rotationally connected to the bearing sleeve.

6. A circuit breaker mechanism comprising three sets of micro-energy trip coils as claimed in claim 3 wherein: The energy storage crank includes a fixed end and a free end, the fixed end is rotationally connected to the operating mechanism, and the free end faces the iron core.

7. A circuit breaker mechanism comprising three sets of micro-energy trip coils as claimed in claim 6 wherein: The energy storage crank is provided with a bending part between the fixed end and the free end, the convex part of the bending part faces the energy storage cam, and the convex end of the energy storage cam is opposite to the convex part.

8. A circuit breaker mechanism comprising three sets of micro-energy trip coils as claimed in claim 7, wherein: The energy storage cam is provided with a pin, and the convex end of the energy storage cam is abutted with the pin.

9. The circuit breaker mechanism of claim 1 comprising three sets of micro-energy trip coils, wherein: The energy storage transmission mechanism further includes a crank reset spring, the crank reset spring is connected to the energy storage crank and the operating mechanism, and the energy release of the crank reset spring resets the energy storage crank.

10. The circuit breaker mechanism of claim 1 comprising three sets of micro-energy trip coils, wherein: The energy storage shaft is connected to the operating mechanism, the three-phase tripping coil, the opening tripping plate and the energy storage transmission mechanism are installed on the operating mechanism, and the opening tripping plate is linked with the tripping device and the opening device of the circuit breaker mechanism.

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